The Defrost Thermostat is an OEM replacement part for Whirlpool refrigerators. It plays a crucial temperature control role in managing the defrost cycle. The thermostat precisely monitors refrigerator compartment temperatures to determine when it is necessary to initiate the defrost process. Symptoms of a bad defrost thermostat can include:   Premature or untimely defrost cycle activation causing warm or melted food   Postponed or improperly triggered defrost cycles that allow frost accumulation   Fluctuating interior temperatures as cooling and defrost systems struggle to regulate properly Over time and with normal refrigerator operation, thermostats can malfunction or fail to provide accurate readings. This replacement thermostat is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore models.R0161088 (AP4247470) replaces 10544005, 12017806, 12017816, 12017823, 67003693, 992, AH2167866, EA2167866, PS2167866, R0161088VP.